Greenhouse Drip Irrigation System Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops. Greenhouse Drip Irrigation System,Greenhouse Micro Irrigation System ,Plant Drip Irrigation JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com
The role of top-dressing seedlings in the seedling stage is to promote roots and strong seedlings. Generally, after fixing the seedlings, urea 2.5-3.5 kg or 1500-2000 kg per acre is applied. If the soil is fertile and the base fertilizer is sufficient, the seedling fertilizer may be applied less or not, and the bottom fertilizer may be poor or the late summer sowing field may be used.
During the flowering period, top dressing may be applied once or twice depending on the situation. If the soil has good fertilizer and fertilizer supply, it can be applied once in the early flowering period; otherwise, it can be applied in the early flowering stage and the flowering and podging stage can be supplemented. The top dressing should not be delayed as soon as possible, but it should not be later than the flowering period at the latest.
Flowering topdressing usually uses 5~7 kg of urea per acre or 2000~2500 kg of manure, and the potassium-depleted soil can also be applied to about 50 kg of plant ash in the early flowering period, and the yield increase effect is also very good. In addition, it is also possible to spray phosphorus and potassium fertilizers from the beginning of sesame to the flowering stage. Generally, 0.2% potassium dihydrogen phosphate solution per acre is used to spray 50~75 kilograms of foliage, spraying every 5~7 days, and even spraying 2 Times.
According to the requirement of sesame, the principle of top dressing is early application of seedlings, re-application before flowering, and supplemental application at flowering time. Top dressing should be dominated by nitrogen fertilizer, supplemented by phosphorus and potassium fertilizers.